package main
import (
"fmt"
"log"
"net/http"
"os"
"os/signal"
"syscall"
)
func main() {
File, err := os.Create("log")
if err != nil {
fmt.Println("创建日志文件错误", err)
return
}
log.SetOutput(File)
ce("pid")
}
func ce(pid string) {
File, err := os.OpenFile(pid, os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
log.Println(err)
return
}
info, _ := File.Stat()
if info.Size() != 0 {
log.Println("pid file is exist")
return
}
if os.Getppid() != 1 {
args := append([]string{os.Args[0]}, os.Args[1:]...)
os.StartProcess(os.Args[0], args, &os.ProcAttr{Files: []*os.File{os.Stdin, os.Stdout, os.Stderr}})
return
}
File.WriteString(fmt.Sprint(os.Getpid()))
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGUSR2)
go HttpServer()
for {
s := <-c
switch s {
case syscall.SIGUSR2:
fmt.Println("自定义型号.")
case os.Interrupt:
fmt.Println("安全退出")
Exit(File)
}
}
}
func HttpServer() {
http.HandleFunc("/", route)
http.ListenAndServe(":1789", nil)
}
func route(w http.ResponseWriter, r *http.Request) {
log.Println(r.URL.Path)
fmt.Fprint(w, "Hello World\n")
}
func Exit(F *os.File) {
F.Close()
os.Remove(F.Name())
fmt.Println("bye")
}
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